Plant transpiration is of great importance in restoration and water resources management, especially, in inland arid region of Northwestern China. In this study, based on the meteorological data of Qingtu Lake in Minqin County, Gansu Province of China, the physiological parameters of the seven typical desert plants, and soil hydraulic characteristics in the inland arid region of China, the transpirations of the seven typical plants were simulated by the Tardieu-Davies model. Moreover, since the xeromorphic plants rely on depth to groundwater. The plant transpiration modelling is executed in the two soil moisture conditions in root zone maintained by groundwater. The soil moistures were roughly estimated by the Van Genuchten model at the depths to groundwater table that were suitable and could lead to extinction for plant growth. The modeling obtained hourly and daily transpiration in the ten years during 2009-2018. Compared to the collected data from the published literatures, our simulated transpirations of the seven typical plants during growing season (April-September) were proven to be reasonable. The modeling results show that the mean transpiration of the seven plants during growing season under the suitable and the extinction depths is 793 and 602 mm, respectively.The transpirations of individual plant species during growing season were different. Under the condition of the suitable depth, the transpirations of Phragmites australis of aquatic plant and Tamarix chinensis of riparian plant were largest, which were 1292 and 1147 mm in growing season, respectively; by contrast, Haloxylon ammodendron needs the least water for transpiration (279 mm) as Haloxylon ammodendron can resists extremely dry climate. The transpirations of the other plant species decrease in the order as follows:940 mm for Halocnemum strobilaceum, 913 mm for Poacynum hendersonii, 534 mm for Nitraria tangutorum, and 448 mm for Populus euphratica in growing season. When the suitable depth declines to the extinction depth, the plant transpiration during growing season decreases by 24%, on average. The decreases of plant transpirations were also different for different plant species. Since Haloxylon ammodendron and Nitraria tangutorum have strong capacity of drought tolerance, their transpirations decrease markedly with depth to water table, e.g., 53 and 35%, respectively, when the suitable depth declines to the extinction depth. Phragmites australis and Tamarix chinensis have low capacity to resist drought. Thus, their transpirations decrease least with the depth to water table, e.g., 19 and 13%, respectively. For the other plant species, when the suitable depth declines to the extinction depth, the transpirations of Populus euphratica, Poacynum hendersonii, and Halocnemum strobilaceum decrease by 33, 25 and 25%, respectively.